Your Subaru may be HUMMING from the back wheels. It's likely a worn out wheel bearing / hub assembly, either on one side, or both!
Removing and replacing a frozen Subaru rear wheel bearing using the Hub Buster Hub shocker tool 8629 from Amazon to get my rusted rear wheel bearing out of the 2015 Subaru Crosstrek.
Stuck seized rusted wheel bearings are common on modern Subaru cars. This one was no exception! It required the Hub Shocker removal tool!
Subaru wheel bearing replacement is hard!
